palmer 60 cooling water pumps

Palmer M60 & P60 Raw Water Pumps Palmer 60 engines used a variety of raw water pumps over the years, all of which are now obsolete. The most common pump was the Sherwood E20 which can be found on most P60’s. The earlier M60’s can be found with Jabsco AL41 pumps or Oberdorfer gear drive pumps.

Sherwood E20 Pumps These pumps were the best application for the Palmer 60’s, mounting directly to the distributor drive housing. They use a rubber bladed impeller with good suction and discharge capabilities.

Other Options Electric drive water pumps are available in the market, but care must be taken to make sure the pump is turned off when the engine is not running. They do not respond to differing RPM demands for cooling like engine driven pumps.

Oberdorfer Gear Drive Pumps These pumps were similar to the engine oil pumps, using two spinning, toothed gears to push water through the engine. They only work for installations where the engine is mounted below water level in the boat, as their suction or “lift” capabilities are very limited.

Jabsco AL41 Pumps These pumps suffered from several design problems. They used an extension shaft to drive the impeller, and a cast steel mount extension for the pump. They also did not provide enough water flow.